Run: 2026-09-10-01M25DK1ZNFT9A67ADK7GAN8P2

Run Details

Duration:
17.2s
Cost:
$0.002898
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
88.89% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The heavy rain hammered the roof of Blackwood Manor as Detective Mara Voss stepped through the grand old front door. Inside, the air smelled faintly of copper, old candle wax, and something quite terrible that she could not ever name. Lord Ashcroft sat slumped in his velvet chair by the fireplace, a silver letter opener buried deep within his chest. His eyes were wide open, and his lips were parted as if he had once tried to speak to someone. An old grandfather clock ticked loudly behind her, marking each second as she studied the silent room for possible clues. The windows were locked tightly, the doors were bolted firmly, and no visible footprints marked the old dusty wooden floor. She knelt carefully beside the body, checking his pockets, and found a folded note clutched tightly in his right hand. The crumpled note read, "Meet me at midnight tonight, or the secret dark truth about us surely dies with you." Mara suddenly felt her pulse quicken because this was no ordinary murder, and the killer definitely remained still somewhere inside. Outside, sudden thunder cracked loudly, and hidden somewhere within Blackwood Manor, an old floorboard creaked under a single careful foot.
created_at"2026-09-10T10:25:07.066Z" 9/10/2026, 10:25:07 AM
model"deepseek/deepseek-v4.1-flash-20260910"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency455
moderation_latency(null)
generation_time17145
tokens_prompt46
tokens_completion4634
native_tokens_prompt65
native_tokens_completion4814
native_tokens_completion_images(null)
native_tokens_reasoning4573
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
service_tier(null)
usage0.00289815
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1789035907-etyMFxEQAQRcHHdWBqBG"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1789035907-GHUyP4FDDBoLMLFrUB7V"
upstream_id"d752a41f-9997-4d3d-a9a0-21a9bdeae3dd"
provider_responses
0
endpoint_id"fd104bc8-535a-4d31-a847-a8e402e86a02"
id"d752a41f-9997-4d3d-a9a0-21a9bdeae3dd"
is_byokfalse
latency344
model_permaslug"deepseek/deepseek-v4.1-flash-20260910"
provider_name"DeepSeek"
status200
total_cost0.00289815
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
88.89% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
020
120
220
320
420
520
620
740
820